The most common causes of pain in the buttocks below the lateral lumbar region are bad posture, lumbar disc herniation, lumbar muscle strain, urinary stones and so on. 1. Bad posture: If the patient maintains a bad posture for a long time, the lumbar and hip muscles are always under pressure, which will easily cause pain and numbness in the buttocks and lower back, which can be relieved by changing the position or resting. 2. Herniated lumbar intervertebral discs: patients due to age, trauma or overstrain and other factors, it is easy to cause degenerative changes in the lumbar spine, the protruding intervertebral discs compress the surrounding soft tissues will produce pain in the buttocks below the lateral lumbar region. 3. Lumbar muscle strain: patients who have long been engaged in heavy labor work, often need to carry heavy objects, lumbar spine of the load is too heavy will easily cause lumbar muscle chronic strain, coupled with the external cold stimulation will produce pain. 4. urinary stones: if the patient has ureteral stones or kidney stones, when the stones stimulate the surrounding mucosa, it is easy to involve the waist, hip pain. Caused by the upper side of the buttocks below the waist pain causes more, but also may be related to muscle strain, fracture, pelvic inflammatory disease and other reasons, if the symptoms persist, it is recommended to promptly go to the hospital to identify the cause of the disease, targeted treatment.